Make time for a Siesta.
An organization called "The Health in Ageing Foundation" carried out a study of 3,000 Chinese adults aged 65 and over, 60% of whom took a nap after lunch of between 30 - 90 minutes.
After their sleep they had to answer questions, solve maths problems and memorize certain words.
Interestingly, it turned out the ones who did best, were the ones who had a 1 hr. nap, in fact they performed up to
six times better than those who slept for shorter or longer stints, or didn't sleep at all.
The Doctor there said "These people experienced the same decline in their mental abilities that a five-year increase in age would cause.
"Moderate nappers had better overall cognition than non-nappers or extended nappers."
So there you go, make time for a Siesta each day.